Revert "hpfs: bitmaps are little-endian"

This reverts commit daf72035b17f7d86a4b801f2c53fef47ed119a88.
Revert "hpfs: optimize quad buffer loading"

This reverts commit 6b3233d415a7ef3cc3cda949bebd2cba599cee46.
Revert "hpfs: implement prefetch to improve performance"

This reverts commit e15ff04f9c15ba72c6024f892f2e41cde874d052.
Revert "HPFS: remove PRINTK() macro"

This reverts commit a61460a140ec1a62bb9c086e3719d9a864f675ca.